We have trouble enough with our two cats seeking out the soft soil in the garden beds. Nothing like working the hands through the soil, followed by that disgusting squish when encountering a kitty land mine. Now you are going to line the beds with kitty litter? Why not just place a large sign, [Cats crap here!].
I've been waiting for years for our two cats to bite the dust. Murderous destructive creatures! I think that they visit my garden regularly, just to let me know that the feeling is mutual. Both were rescue cats, tossed out by the road. They have had a good life, mostly living on our deck. One is quite affectionate and the other is most disdainful and standoffish. These will be our last two ever. Since these two, any strays prompt a call to the pound where they can do what they want with them. My vote is for birds and wildlife, and feral cats simply do not belong in that equation.
Eclectic gardening style, drawing from 45 years of interest and experience. Mostly plant in raised beds and containers primarily using intensive gardening techniques.